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Fungrim entry: 534f7d

B1=#{{{1}}}=1B_{1} = \# \left\{\left\{\left\{1\right\}\right\}\right\} = 1
Fungrim symbol Notation Short description
BellNumberBnB_{n} Bell number
Cardinality#S\# S Set cardinality
Source code for this entry:
    Equal(BellNumber(1), Cardinality(Set(Set(Set(1)))), 1))

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2021-03-15 19:12:00.328586 UTC